package com.newworld.dmsapp2.util;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;

import org.litepal.crud.DataSupport;

import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.media.MediaScannerConnection;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;

import com.newworld.defect.SingleMediaScanner;
import com.newworld.dmsapp2.R;

/**
 * @author coolszy
 * @date 2012-4-26
 * @blog http://blog.92coding.com
 */

public class UpdateManager {
	/* 下载中 */
	private static final int DOWNLOAD = 1;
	/* 下载结束 */
	private static final int DOWNLOAD_FINISH = 2;
	/* 保存解析的XML信息 */
	HashMap<String, String> mHashMap;
	/* 下载保存路径 */
	private String mSavePath;
	/* 记录进度条数量 */
	private int progress;
	/* 是否取消更新 */
	private boolean cancelUpdate = false;

	private Context mContext;

	// 更新版本号
	private String updateVersionCode;

	// 更新版本名
	//private String updateVersionName;

	// 更新软件url
	private String updateUrl;
	// 软件名
	private String appName;

	// 是否更新本地数据库 1:更新 0：不更新
	private String updateData;
	/* 更新进度条 */
	private ProgressBar mProgress;
	private Dialog mDownloadDialog;

	private Handler mHandler = new Handler() {
		public void handleMessage(Message msg) {
			switch (msg.what) {
			// 正在下载
			case DOWNLOAD:
				// 设置进度条位置
				mProgress.setProgress(progress);
				break;
			case DOWNLOAD_FINISH:
				// 安装文件
				installApk();
				break;
			default:
				break;
			}
		};
	};

	public UpdateManager(Context context, String updateVersionCode,
			String updateName, String updateUrl, String appName,
			String updateData) {
		this.mContext = context;
		this.updateVersionCode = updateVersionCode;
		this.updateUrl = updateUrl;
		/*this.updateVersionName = updateVersionName;*/
		this.appName = appName;
		this.updateData = updateData;
	}

	/**
	 * 检测软件更新
	 */
	public void checkUpdate() {
		/*
		 * if (isUpdate()) { // 显示提示对话框 showNoticeDialog(); } else {
		 * Toast.makeText(mContext, R.string.soft_update_no,
		 * Toast.LENGTH_LONG).show(); }
		 */
		showNoticeDialog();
	}

	/**
	 * 检查软件是否有更新版本
	 * 
	 * @return
	 */
	@SuppressWarnings("unused")
	private boolean isUpdate() {
		boolean flag = false;
		// 获取当前软件版本
		int versionCode = 0;
		try {
			versionCode = getVersionCode(mContext);
		} catch (Exception e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
		int serviceCode = Integer.valueOf(updateVersionCode);
		// 版本判断
		if (serviceCode > versionCode) {
			flag = true;
		} else {
			flag = false;
		}
		return flag;
	}

	/**
	 * 检查软件是否有更新版本
	 * 
	 * @return
	 */
	@SuppressWarnings("unused")
	private void isUpdateData() {
		if (updateData.equals("1")) {
			deleteData();
			deleteFilesByDirectory(new File(Config.IMAGE_PATH));
			deleteFilesByDirectory(new File(Config.VOICE_PATH));
		}
	}

	/*
	 * 删除本地数据库
	 */
	private void deleteData() {
		DataSupport.deleteAll(com.newworld.dmsapp2.bean.User.class);
		DataSupport.deleteAll(com.newworld.dmsapp2.bean.Function.class);
		DataSupport.deleteAll(com.newworld.dmsapp2.bean.Photo.class);
		DataSupport.deleteAll(com.newworld.dmsapp2.bean.Task.class);
		DataSupport.deleteAll(com.newworld.dmsapp2.bean.RelationHouse.class);
		DataSupport.deleteAll(com.newworld.dmsapp2.bean.RepairApply.class);
		DataSupport.deleteAll(com.newworld.dmsapp2.bean.RepairNode.class);
		DataSupport.deleteAll(com.newworld.dmsapp2.bean.Server.class);
	}

	// 删除方法 这里只会删除某个文件夹下的文件，如果传入的directory是个文件，将不做处理 * * @param directory
	@SuppressLint("NewApi")
	public void deleteFilesByDirectory(File directory) {
		if (directory != null && directory.exists() && directory.isDirectory()) {
			for (File item : directory.listFiles()) {
				System.out.println("item.getAbsolutePath()>>>>>"
						+ item.getAbsolutePath());
				String fileName = item.getName();
				System.out.println(fileName);
				item.delete();
				String filePath = directory + fileName;
				MediaScannerConnection.scanFile(mContext,
						new String[] { directory + fileName }, null, null);
				File dbFile = new File(filePath);
				new SingleMediaScanner(mContext, dbFile);
			}
		}
	}

	/**
	 * 获取软件版本号
	 * 
	 * @param context
	 * @return
	 */
	private int getVersionCode(Context context) throws Exception {
		// 获取packagemanager的实例
		PackageManager packageManager = context.getPackageManager();
		// getPackageName()是你当前类的包名，0代表是获取版本信息
		PackageInfo packInfo = packageManager.getPackageInfo(
				context.getPackageName(), 0);
		int version = packInfo.versionCode;
		return version;
	}

	/**
	 * 显示软件更新对话框
	 */
	private void showNoticeDialog() {
		// 构造对话框
		AlertDialog.Builder builder = new Builder(mContext);
		builder.setTitle(R.string.soft_update_title);
		builder.setMessage(R.string.soft_update_info);
		// 更新
		builder.setPositiveButton(R.string.soft_update_updatebtn,
				new OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.dismiss();
						// 显示下载对话框
						showDownloadDialog();
					}
				});
		// 稍后更新
		builder.setNegativeButton(R.string.soft_update_later,
				new OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.dismiss();
					}
				});
		Dialog noticeDialog = builder.create();
		noticeDialog.show();
	}

	/**
	 * 显示软件下载对话框
	 */
	private void showDownloadDialog() {
		// 构造软件下载对话框
		AlertDialog.Builder builder = new Builder(mContext);
		builder.setTitle(R.string.soft_updating);
		// 给下载对话框增加进度条
		final LayoutInflater inflater = LayoutInflater.from(mContext);
		View v = inflater.inflate(R.layout.softupdate_progress, null);
		mProgress = (ProgressBar) v.findViewById(R.id.update_progress);
		builder.setView(v);
		// 取消更新
		builder.setNegativeButton(R.string.soft_update_cancel,
				new OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.dismiss();
						// 设置取消状态
						cancelUpdate = true;
					}
				});
		mDownloadDialog = builder.create();
		mDownloadDialog.show();
		// 现在文件
		downloadApk();
	}

	/**
	 * 下载apk文件
	 */
	private void downloadApk() {
		// 启动新线程下载软件
		new downloadApkThread().start();
	}

	/**
	 * 下载文件线程
	 * 
	 * @author coolszy
	 * @date 2012-4-26
	 * @blog http://blog.92coding.com
	 */
	private class downloadApkThread extends Thread {
		@Override
		public void run() {
			try {
				// 判断SD卡是否存在，并且是否具有读写权限
				if (Environment.getExternalStorageState().equals(
						Environment.MEDIA_MOUNTED)) {
					// 获得存储卡的路径
					String sdpath = Environment.getExternalStorageDirectory()
							+ "/";
					mSavePath = sdpath + "download";
					URL url = new URL(updateUrl);
					// URL url = new
					// URL("http://219.140.198.82:18088/AndroidTest/DmsApp2.apk");
					// URL url = new
					// URL("http://gdown.baidu.com/data/wisegame/f98d235e39e29031/baiduxinwen.apk");
					// 创建连接
					HttpURLConnection conn = (HttpURLConnection) url
							.openConnection();
					conn.connect();
					// 获取文件大小
					int length = conn.getContentLength();
					// 创建输入流
					InputStream is = conn.getInputStream();

					File file = new File(mSavePath);
					// 判断文件目录是否存在
					if (!file.exists()) {
						file.mkdir();
					}
					File apkFile = new File(mSavePath, appName);
					FileOutputStream fos = new FileOutputStream(apkFile);
					int count = 0;
					// 缓存
					byte buf[] = new byte[1024];
					// 写入到文件中
					do {
						int numread = is.read(buf);
						count += numread;
						// 计算进度条位置
						progress = (int) (((float) count / length) * 100);
						// 更新进度
						mHandler.sendEmptyMessage(DOWNLOAD);
						if (numread <= 0) {
							// 下载完成
							mHandler.sendEmptyMessage(DOWNLOAD_FINISH);
							break;
						}
						// 写入文件
						fos.write(buf, 0, numread);
					} while (!cancelUpdate);// 点击取消就停止下载.
					fos.close();
					is.close();
				}
			} catch (MalformedURLException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}
			// 取消下载对话框显示
			mDownloadDialog.dismiss();
		}
	};

	/**
	 * 安装APK文件
	 */
	private void installApk() {
		File apkfile = new File(mSavePath, appName);
		if (!apkfile.exists()) {
			return;
		}
		// 通过Intent安装APK文件
		Intent i = new Intent(Intent.ACTION_VIEW);
		i.setDataAndType(Uri.parse("file://" + apkfile.toString()),
				"application/vnd.android.package-archive");
		mContext.startActivity(i);
	}
}
